Siemens 6ES5835-6SC21 SIMATIC S5 SOFTWARE is a legacy programming package for Siemens SIMATIC S5 PLCs, identified by the part number 6ES5835-6SC21 and also listed as 6ES58356SC21. The bundle is described as a single-license software set delivered on floppy disk, English-language only, with no accompanying documentation. It is designed to run on older Windows platforms—Windows 95, Windows 98, Windows NT, and Windows 2000 Professional—reflecting its era of use.
